RECON: TNO occultation with 54598

Event between (54598) Bienor and star UC4-654-014368 with event index number of 178021

Geocentric closest approach at 2019/01/11 01:02:37 UTC

J2000 position of star is 03:19:57.8 +40:40:53
Equinox of date position of star is 03:21:06.9 +40:44:37
Stellar brightness R=16.0, use SENSEUP=128
Star is 77 degrees from the moon. Moon is 21% illuminated.
TNO apparent brightness V=19.4

TNO is 14.7 AU from the Sun and 14.2 AU from the Earth.
The TNO is moving 13.6 km/sec on the sky relative to the star, or, 4.8 arcsec/hr.
The 1-sigma error in the time of the event is 64 seconds.
The 1-sigma cross-track error in the shadow position is 904 km.

The TNO has an absolute magnitude Hv=7.5
Diameter=190.6 km assuming a 5% albedo -- 14.0 sec chord
Diameter=77.8 km assuming a 30% albedo -- 5.7 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 54598, (2019/01/11 01:03UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:00.9 +16:32:46  0.8 29.22  85
Algol          03:09:24.9 +41:01:40  2.1  2.25  75
PPM 046142     03:26:25.3 +41:19:24  6.4  1.14  78
PPM 046107     03:24:46.4 +41:16:25  7.8  0.85  77
PPM 046009     03:19:17.1 +40:46:03  9.9  0.37  76
PPM 046053     03:21:57.7 +40:49:42 10.3  0.16  77
54598          03:21:13.1 +40:44:58 16.0        77
Positions are for equinox of date

Azimuth is measured in degrees eastward from north. North is at an azimuth of 0, due East is at an azimuth of 90 degrees, due South is 180, and due West is 270.

Do not use the listing below for the RECON CPC 1100 telescopes. This is provided for other non-team facilities.

Star training set for 54598, (2019/01/11 01:03UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:30  0.8 29.22  85
Algol          03:08:10.1 +40:57:20  2.1  2.25  75
PPM 046142     03:25:09.4 +41:15:27  6.4  1.14  78
PPM 046107     03:23:30.6 +41:12:25  7.8  0.85  77
PPM 046009     03:18:01.9 +40:41:56  9.9  0.37  76
PPM 046053     03:20:42.3 +40:45:38 10.3  0.16  77
54598          03:19:57.8 +40:40:53 16.0        77
Positions are for J2000

Event circumstances last updated at 2017/06/14 17:02:58 UT

Marc W. Buie, Southwest Research Institute

RECON